Chemistry-
General
Easy
Question
From B2H6 , all the following can be prepared except –
- B2O3
- H3BO3
- B2 (CH3)6
- NaBH4
The correct answer is: B2 (CH3)6
Related Questions to study
chemistry-
black coloured compound (A) on reaction with dilH2SO4 gives a gas (B) which on passing in a Solution of an acid (C) gives a white turbidity (D)Gas (B) when passed in an acidified Solution of a compound (E) gives a black precipitate (F) which is Soluble in hot concentrated (C)After boiling this Solution when excess of ammonia Solution is added, a blue coloured compound (G) is formed To the Solution of (E), on addition of acetic acid and aqpotassium ferrocyanide, a chocolate brown precipitate (H) is formed On addition of an aqueous Solution of BaCl2 to an aqueous Solution of (E) white precipitate in Soluble in HNO3 is obtained
When a piece of iron or zinc is added to the Solution of a compound (F) in hot concentrated (C) acid:
black coloured compound (A) on reaction with dilH2SO4 gives a gas (B) which on passing in a Solution of an acid (C) gives a white turbidity (D)Gas (B) when passed in an acidified Solution of a compound (E) gives a black precipitate (F) which is Soluble in hot concentrated (C)After boiling this Solution when excess of ammonia Solution is added, a blue coloured compound (G) is formed To the Solution of (E), on addition of acetic acid and aqpotassium ferrocyanide, a chocolate brown precipitate (H) is formed On addition of an aqueous Solution of BaCl2 to an aqueous Solution of (E) white precipitate in Soluble in HNO3 is obtained
When a piece of iron or zinc is added to the Solution of a compound (F) in hot concentrated (C) acid:
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A sodium salt on treatment with MgCl2 gives white precipitate only on heating The anion of the sodium salt is :
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The correct option(s) to distinguish nitrate salts of Mn2+ and Cu2+ taken separately is (are)
The correct option(s) to distinguish nitrate salts of Mn2+ and Cu2+ taken separately is (are)
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For the given aqueous reaction which of the statement(s) is (are) true ? 
For the given aqueous reaction which of the statement(s) is (are) true ?
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The equilibrium 
in aqueous medium at 25°C shifts towards the left in the presence of :
The equilibrium in aqueous medium at 25°C shifts towards the left in the presence of :
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In blue Solution of copper sulphate excess of KCN is added then Solution becomes colourless due to the formation of
In blue Solution of copper sulphate excess of KCN is added then Solution becomes colourless due to the formation of
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The fibre which is less elastic is .............
The fibre which is less elastic is .............
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The soil which is suitable for growing cotton is...
The soil which is suitable for growing cotton is...
chemistry-General
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Oxygen differs from the otehr elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important for oxygen compounds. Oxygen is never more than divalent because when it has formed two covalent bonds, there are no low energy orbitals which can be used to form further bonds. However, the elements S, Se, Te and Po have empty d-orbitals which may be used for bonding and they can form four or six bonds by unpairing eletctrons. However, the higher oxidation states becomes less stable on descending the group. p - dpThe bond between S and O or Se and O, are much shorter than might be expected for a single bond owing to p interaction between the p-orbital of oxygen and d-orbital of S or Se.
Which of the following statement is incorrect?
Oxygen differs from the otehr elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important for oxygen compounds. Oxygen is never more than divalent because when it has formed two covalent bonds, there are no low energy orbitals which can be used to form further bonds. However, the elements S, Se, Te and Po have empty d-orbitals which may be used for bonding and they can form four or six bonds by unpairing eletctrons. However, the higher oxidation states becomes less stable on descending the group. p - dpThe bond between S and O or Se and O, are much shorter than might be expected for a single bond owing to p interaction between the p-orbital of oxygen and d-orbital of S or Se.
Which of the following statement is incorrect?
chemistry-General
chemistry-
Statement - 1 : Reddish brown gas, NO2 when passed through alkalies gives nitrite only.
Statement – 2 : NO2 is acidic in nature and is a mixed anhydride of nitric and nitrous acids.
Statement - 1 : Reddish brown gas, NO2 when passed through alkalies gives nitrite only.
Statement – 2 : NO2 is acidic in nature and is a mixed anhydride of nitric and nitrous acids.
chemistry-General
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Which of the following can be reduced by HF?
Which of the following can be reduced by HF?
chemistry-General
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Which one of the following statements regarding helium is incorrect ?
Which one of the following statements regarding helium is incorrect ?
chemistry-General
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The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:
The reaction of zinc with dilute and concentrated nitric acid, respectively, produces:
chemistry-General
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A red liquid (A) when treated with sodium carbonate gives a mixture of two salts (B) and (C) in the Solution The mixture then on acidification with sulphuric acid and distillation produces the red liquid (A) again Which of the following statement is correct?
A red liquid (A) when treated with sodium carbonate gives a mixture of two salts (B) and (C) in the Solution The mixture then on acidification with sulphuric acid and distillation produces the red liquid (A) again Which of the following statement is correct?
chemistry-General
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Ozone is an unstable, dark blue diamagnetic gasIt absorbs strongly the UV radiation, thus protecting the people on the earth from the harmful UV radiation from the sun The use of chlorofluorocarbon (CFC) in aero Sols and refrigerators, and their subsequent escape into the atmosphere, is blamed for making holes in the ozone layer over the Antarctic, and Arctic Ozone acts as a strong oxidising agent in acidic and alkaline medium For this property ozone is used as a germicide and disinfectant for sterilising water and improving the atmosphere of crowded places
Identify the incorrect statement with respect to ozone
Ozone is an unstable, dark blue diamagnetic gasIt absorbs strongly the UV radiation, thus protecting the people on the earth from the harmful UV radiation from the sun The use of chlorofluorocarbon (CFC) in aero Sols and refrigerators, and their subsequent escape into the atmosphere, is blamed for making holes in the ozone layer over the Antarctic, and Arctic Ozone acts as a strong oxidising agent in acidic and alkaline medium For this property ozone is used as a germicide and disinfectant for sterilising water and improving the atmosphere of crowded places
Identify the incorrect statement with respect to ozone
chemistry-General
